Chevrolet Suburban
6.2L V8, 420 hp, same Gen V architecture as the 5.3 but deeper exhaust note and noticeably more shove. 2021-2024: manufacturing left metal shavings in 597,000 engines — GM's fix was switching to 0W-40 oil. NHTSA opened an investigation into post-recall failures. Same DFM lifter risk as the 5.3. Pre-2021 or confirmed post-recall units with documented oil changes are the buy.
Suburban 6.2 T1XX — 420 hp, check recall status!
420 hp with DFM and the L87 metal debris recall (2021-2024). Get a clean one: the fastest Suburban. NHTSA investigating post-recall failures.
Engine Weaknesses 4
Manufacturing debris (metal shavings) in engine destroys bearings. 2021-2024 L87. Free engine replacement, 6-8 week wait. NHTSA investigating post-recall failures.
Same lifter issue as 5.3L — cylinder deactivation wears lifters.
Symptoms: Ticking/knocking, misfires, rough running
Piston rings let oil past — 0.5-1 quart per 2,000 miles in severe cases. Also affects 2019-2020 L87 not covered by the machining debris recall. NHTSA investigating these cases separately.
Symptoms: Blue smoke, dropping oil level, fouled spark plugs, positive oil consumption test
Timing chain and guides wear at high mileage — same issue as the 5.3L V8.
Symptoms: Cold start rattle, P0008/P0016 OBD codes
Vehicle Weaknesses 4
Faulty Vitesco fuel pump power control module can cause intermittent fuel pump failure — engine stalls unexpectedly while driving. GM Recall N212332040 covering approx. 15,000 2021 Tahoe, Suburban, Escalade, Yukon SUVs. Free dealer repair.
Same 10L80 issue as Silverado T1XX. Recall 26V085.
Factory clearcoat fails prematurely — peeling, cracking, cloudiness, flaking and microblistering reported on roof and hood. Class action lawsuit filed against GM. Some 2021 Tahoes showed bare metal and rust bubbling after just 40 months. Cosmetic repair cost significant without manufacturer support.
Instrument cluster blacks out completely while driving — speedometer, fuel gauge, warning lights all disappear. Often tied to the broader electrical issues on this generation. Airbag 'Service Safety Restraint System' warnings also reported.
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All Chevrolet models Suburban T1XX overview